Apparatus for handling pulverulent material



G. S. COMSTOCK, JR

APPARATUS FOR HANDLING 'PULVERULENT MATERIAL Fil ed April 14. 1920 2 Sheets-Sheet 1 gnuenfoz Grime/ g Get 2 1923.. 1,469,311

. G. 5. CQMSTOCK, JR

APPARATUS FOR HANDLING PULVERULENT MATERIAL Filed April 14 1920 2 Sheets-Sheet 2 Patented et. 2, i923.

pairs stars PTENT i GEORGE S. COMSTOCK, 31%., OF STEELTQIT, PENNSYLVANlIA, ASSIGNOR TO BETHLEHEINI STEEL COMPANY, OF BETHLEHEM, PENNSYLVANIh, 'A CORPORATION OF PENN- SYLVANIA.

APPARATUS FOR HANDLING- PULVERULENT IVZATERIAL.

Application filed April 14, 1920. Serial No. 373,863.

To aZZ whom it may concern: I

Be it known that I, GEORGE S. CoirsTooK, Jr, a citizen of the United States, and residing at Steelton, Dauphin County, State of Pennsylvania, have invented certain new and useful Improvements in Apparatus for Handling Pulverulent' Material, of which the following is a. specification.

The general object of this'invention is to provide an improved pneumatic apparatus for handling pulverulent material, particularly to provide an apparatus of this character adapted to be used for gathering separated small bodies or deposits of coal or coke dust which form rapidly where coal or coke are handled in large quantities, as for instance around blast furnaces, and conveying this dust or braize to a bin or receptacle from which it may from time to time. be discharged in larger quantities. The apparatus may be used, however, in other ways if desired, as in unloading cars on boats loaded with grain;

An important feature of the invention is the novel intake nozzle which is provided for each of the intake tubes of the apparatus and which is so designed that it will not become clogged or choked withthe material into which, the nozzle is thrust and thus impede the working of the apparatus. I

This nozzle is so constructed that a portion ofits mouth or intake openlngis covered by a shield or guard and to this portion of the mouth air from the rear end of Lila nozzle is conducted. In other words, the mouth of the nozzle is divided, one portion being for a mixture of air and pu verluent n'iaterial and the other portion for air alone, and a shield is provided, having an air inlet in rear oi": the mouth of the nozzle for bringing air to its mouth; By this means a certain supply or" air to the intake nozzle assured, notwithstanding the possibility of the clogging of the opening through which the pulverulent material enters, and it is therefore inioossible for the intake tube to become clogged at other.

points along its length due to insufliciency of airfor conveying purposes. @ther objects of the invention, and advantages thereor", will appear from the description and from the drawings.

In the drawings: I i

Figure 1 illustrates in side elevation one inbodiraent of the invention as installed adjacent the base of a blast furnace;

Figure 2 is a perspective view of the suction inlet nozzle Figure 3 is a longitudinal. sectional view through the inlet nozzle;

Figure 4c is a section along the line 4-& of figure 3;

Figure 5 of figure 1 Figure 6 of figure 5. i i v The bin or receiver 10 is positioned conveniently near-the base of the blast furnace and near the coal handling platform or mechani m, and is connected by means of is to section along the line 5-5 a larger scale; and a sect on along the line 6(i a conduit 11 to anair pump 12 which, in the" operation of the apparatus, continually tends to exhaust the-air within the same;

Supported upon the bin 10 and outside thereof near its upper end, is a valve casing 18' having passages 14 and 15 therethrough, the inner ends of which open into the in terior of the bin and the outer ends or" which are connected to conveying tubes 16 and 17 respectively. A sliding valve 18 movable transveresly in a slot provided in the valve casing is adapted to bring either but not both of said conveying tubes into connnunication with the interior of the bin 10. As illustrated in Figures 5 and 6, the

ports in valve 18 are so spaced that when one of the passages to the valve is open the other must necessarily be closed. By this construction, it is possible for a plurality of conveying tubes to be connected to a common receiver or bin having a vacuum pump of only moderate size, thepuinp being only of such size as to be capable of operating one tube at a time. It is obvious that to operate a number of tubes simultaneously, a large sized pump would be required, which would involve not only considerable expense in installation but large operation costs.

To the lower end of each of the tubes 16 and '17 is secured a novel form of suction inlet nozzle, clearly illustrated in Figures 2, 3 and 4a This nozzle comprises essentially a tubular portion 19 havinga circular having secured to its outside shield 21 the surface thereof. The current of air which extends parallel t-iereto and around in front of the inlet opening Pr ably this shield 21 covers up one-half of the inlet opening and it forms with the outside of conduit 19 a second conduit for leadingair to the oyening 20, the rear end of this second conduit being unobstructed at all times. t

In the operation'ot the apparatus the suction inlet nozzle on the end of that tube which is connected to the interior of the bin is thrust into a quantity of pulyeruient ma :erial so that the inlet opening 20 is-beloy;

rushing; into the tube because of the part vacuumexist-in in the receiving bin l0 c2; ries with it powdered or granular material hrough that half oi the opening 20 which is not covered by the shield 2L. portion of the opening becomes clogg with the riiaterial being conveyed, the air supplied through the second conduit to the main conduit, is sufiieient to prevent the intake tube from becoming clogged at any other point along its length due to lack oi The entrance to the conduit en closed by the shield 2i is never obstructed l'eing at no time inserted beneath the sur ace of the material to be conveyed. lhe

here being always a su'l'licient amount of air ,assing to carry the braize or material thee. in the tube, when the obstruction of the nozzle occurs, into the receiving tank. The air passing through the unobstructed half of the opening 20 will also tend to clear away the obstruction of the other part of th openin Various changes may be made in "he structure and arrangement of parts of the invention and I do not limit myself therefore to the exact form shown and described. Having thusdescribed the invention What In case this sufiieient quantity oi air for carrying pun ystein, therefore, can never become (flick d,

is claimed as ne 1 and desired to be secured Letters Patent is:

1. fa suction nozzle for handling pulverulent material comprising an open ended tube, one end of which constitutes an intake opening "for pulverulent material and air, and the other end of which is adapted to be connected to a suction hose, and a second tube secured to one side of said first tube and extending forwardly beyond the intake opening of the first tube, said second tube having its rear end open to the airand its :torward end closed and extending in front of a portion of the intake opening of the lirst'tube to constitute a guard preventing the entrance or pulverulen-t material into said portion oi the intake opoi" conduct air to said intake ope opening of the first tube and having its rear [end open to the air and it toward en-I,

closed and extending in front or a portion of the intake opening of the first tube to constitute a guard preventing the entrance of pulverulent material into said portion of the intake opening and to conduct air to said opening to prevent clogging of the same by pulVerulen-t material. u

G130. CGMSTOCK, JR.

Witnesses:

WALTER L. 'GUonri," CAMnaoNIS. CONRAD.

rig, and to 

